The knurled ring starter contact bolt, designed for Citroën 11CV and 15CV, is an essential automobile component. This ring ensures a firm and reliable connection between the start panel and the vehicle's electrical components. With its precise knurled pattern, it offers optimal grip and prevents loosening due to vibrations while driving. Made of high-quality material, it enhances the vehicle's durability and lifespan. This knurled ring is compatible with both vintage and well-maintained classic models, contributing to preservation and performance optimization.